The death toll continues to rise after Palestinians launched hundreds of rockets into Israel prompting retaliatory air and artillery strikes on Sunday.

Reportedly, at least four Israelis and 23 Palestinians were killed.

Palestinians in the Gaza Strip fired more than 600 rockets into southern Israel in less than 24 hours, killing at least four Israelis and leaving several more in critical condition.

On Sunday, Israeli Prime Minister Benjamin Netanyahu said he had ordered the military to "continue its massive strikes on terror elements" in Gaza.

Israel also closed all schools within 40km (25 miles) of the Gaza strip and opened some shelters to the public.